Cylinder block construction



Dec. 20, 1932. A. GAIYDOUX 1,891,638

' CYLINDER BLOCK CONSTRUCTION Filed Oct. 23. 1929 aMyWL 62/ army-e G 60M 22 Patented Dec. 20, 1932 UNITEDv STATES PATENT- OFFICE ANDRE GADOUX, OF LA TRETTE, FRANCE, ASSIGNOR, BY DIRECT AND MESNE ASSIGN- MENTS, OF ONE-HALF TO SOCIETE' POUR LEXPLOIT'ATION DES BREVETS GADOUX, OF PARIS, FRANCE, AND ONE-HALF TO HUPP MOTOR CAR CORPORATION, OF DE- TROIT, MICHIGAN, A CORPORATION OF VIRGINIA l CYLINDER BLOCK CONSTRUCTION Application filed October 23, 1929, Serial No. 401,782, and in Belgium October 30, 1928.

The present invention relates to cylinderblock construction and, more especially, to those of the type adapted for use in internal combustion engines.

One of the objects of the invention is to so improve the cooling of the combustion chamber of internal combustion motors that the volumetric compression of explosive mixtures to be burnt therein may be increased and the thermal efficiency of the motor thereby improved.

Another object is to provide a composite assembly permitting the combustion chamber to be formed of a light, highly conducting metal without danger of distortion of the latter.

Further objects will appear in the course of the detailed description now to be given with reference to the accompanying drawing, in which Fig. 1 1s a section (taken on line 1-1 of -Fig. 2) representing one illustrative enibodiment of the invention;

Fig. 2 is a plan of the same motor with portions of the cylinder-head clamping plate removed. I

Referring to the various figures of the drawing, there is shown a cylinder-block assembly composed of steel or iron casting b having one or more cylinder bores therein and provided with a water-j acket of conventional design,an aluminium or aluminium alloy (or other highly heat-conducting metal) plate 0, cast or otherwise formed so as to present a combustion chamber a out of line (form shown) or in line, with the cylinders of casting b, the external surface of chamber a being provided with a series of parallel ribs 0 positioned so as to guide the cooling water obliquely in the direction of the arrows (Fig. 2) from the inlet ports 7 across the top of the combustion chamber towards the outlet port It, and a clamping plate (Z, formed of steelor cast iron, positioned on top of plate 0 and held in assembled relation with the latter and with casting b by bolts 6 traversing bores c with a slight amount of play.

Water-cooled cylinder-block assemblies of the type hereinabove described i. e. wherein plate (1 and block b are formed of ferrous metal and plate 0 of an aluminium alloy, are found to so efficiently cool the walls of com bustion chamber a that higher compressions than those now used may be obtained and the thermal efliciency of the motor considerably increased. The improved cooling also prevents auto-ignition of the mixtures in chamber a and prolongs thelife of spark-plugs inserted thereinto. 'Ribs a have the triple function of rigidifying the dome of the combustion chamber, of increasing the combustion chamber surface in heat conductive relation with the cooling of guiding the cooling water entering laterally from block I) through ports 7 towards a passage running along or near the central portions of the various combustion chamber domes toward outlet port it. Plate d, bearing centrally as shown, on the combustion chamber domes and laterally, on the edges of the latter, prevents any tendency towards distortion.

What I claim is 1.- In an internal combustion engine, a ferrous material block having a cylindrical bore therein, a hollow. cylinder head mounted on.

said block and having ports formed therein for the passage of cooling water, said cylinder head having a combustion chamber formed therein whose walls are composed of metal having a higher heat conductivity than said ferrous metal block, the hollow interior of said cylinder head having a plurality of parallel spaced elongated ribs formed thereon on portions of the walls thereof in direct heat communication with said combustion chamber.

2. In an internal combustion engine, a ferrous metal block having a cylindrical bore therein, a hollow cylinder head mounted on said block and having ports formed therein for the passage of cooling water, said cylin-- der head having a combustion chamber formed therein whose walls are composed of a metal having a higher heat conductivity than said ferrous metal block, the hollow interior of said cylinder head having groups of par allel spaced elongated ribs convergingly ar ranged on portions of the walls thereof in direct heat communication with said combustion chamber.

3. In combination with a cylinder block, of a head therefor having a combustion chamber and formed of light material responsive to temperature changes, and a reinforcing member for said head formed of a different material relatively unresponsive to tempera ture changes, said member having a bracing portion bearing on the Wall of the combustion chamber wherethrough a spark plug extends.

4. In combination with a cylinder block, of a head therefor formed of light material responsive to temperature changes, and a reinforcing member for said head formed of a different material relatively unresponsive to temperature changes, said head having spaced heat radiating ribs extending to contact with said member to provide a bracing structure.

The engine construction as defined in claima in which the ribs form separate parallel passages adapted to direct cooling Water.

6. The engine construction as defined in claim 4 in which said head has a combustion chamber, and said ribs are formed in parallelly aligned groups arranged in converging relation to form separate passages to direct cooling water over the top wall of said combustion chamber. a

7. In combination with a cylinder block, of a head therefor formed of a light material responsive to temperature changes, and a reinforcing member for said head formed of a different material relatively unresponsive to temperature changes, said head having spaced elongated ribs forming separate passages adapted to direct cooling Water.

8. The engine construction as defined in claim 7 in which said ribs are formed in parallelly aligned groups arranged in con verging relation.

In testimony whereof I aflEiXed my signature.

ANDRE GADOUX. 

